Made some cool patterns today in a lab

To be a little technical, it's a product of a chemical vapor-deposition of Parylene C on a silicone wafer (it makes a thin layer of protective polymer on it).
The pattern is created from a grid, that has circular holes, on which the wafers sit and I ran the deposition process twice on the same wafers, so it created an overlaying colourful pattern ...which is very pretty ;)
PS: the real product I'm interested in is on the other side of the wafer